fix(ci): exclude e2e tests from unit test job

The test job doesn't install Playwright browsers, so e2e tests error
when pytest collects them. Ignore tests/e2e/ directories in the test
job — those are handled by the dedicated e2e-blackbox job.

.github/workflows/ci.yml

@@ -66,12 +66,12 @@ jobs:
       - name: Test changed packages
         run: |
           if [ "${{ github.event_name }}" = "push" ]; then
-            uv run pytest packages/ -v
+            uv run pytest packages/ -v --ignore=packages/blackbox/tests/e2e
           else
             CHANGED='${{ needs.changes.outputs.packages }}'
             for pkg in $(echo "$CHANGED" | jq -r '.[]'); do
               echo "::group::Testing $pkg"
-              uv run pytest "packages/$pkg" -v
+              uv run pytest "packages/$pkg" -v --ignore="packages/$pkg/tests/e2e"
               echo "::endgroup::"
             done
           fi